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Unit 2 Evolution Research Paper

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BSC 1020 – Reflection Paper Unit G

Evolution and its Processes

This unit covers the theory of evolution, its mechanisms, the modern synthesis of genetics and evolution, and classification of species. The first chapter describes the history involved in Darwin’s theory of evolution. It talks about the evidence that supports evolution like the fossil record, biogeography (geographical distribution of species), comparative anatomy, comparative embryology and molecular biology. These collections of evidence help explain how species evolve from a common ancestor with gradual changes over time due to natural selection.
Natural selection states that certain traits of an organism inside a population are better for adapting to the environment. …show more content…

Scientists focused on the gene pool of populations to account for the different traits being exhibited by members in the population. The different genes in the gene pool account for the variation in a population and mutations account for different alleles that an organism may have. When gene pools are changed by some sort of event or action, they are referred to as mechanisms of evolution. Genetic drift, the bottleneck effect, and gene flow are examples of mechanisms of evolution.
The second chapter of this unit talks about how species originate and how they are classified. Organisms are split into different species when their genotypes and phenotypes differ and they cannot breed an offspring capable of reproducing. Reproductive barriers and prezygotic barriers are two types are what prevent two different species from interbreeding. Speciation, the split of an organism into two different species over time, in different ways, allopatric speciation (geographical barrier), and sympatric speciation(reproductively isolated in same

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The Scorpihuahua is an excellent example of two very unique species, the Chihuahua belonging to the Canis Lupus familiaris and the Scorpion being an Arachnida, which was created through artificial selection experiments which wanted to assess the limits as just how far hybridization can actually occur. Although the Scorpihuahua was difficult to create, as the fitness level of the organism was originally low, the hybrid has truly evolved into an organism that is very much able to defend itself and successfully procreate. The Chihuahua organism, a very small animal, seemed to have trouble defending itself in the harsh conditions in which it must survive, and the Scorpion organism, a venomous walking Arachnidan, was faulted in its inability to protect itself against predators much bigger than its very small self. The hybrid manages to create a much more fit organism that the Scorpion or Chihuahua could ever be alone. The Scorpihuahua has the benefit of being able to move at a faster speed than the original Scorpion organism, and has the benefit of being able to deliver a poisonous sting should it ever need to defend

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Biology, the study of life and living organisms, is complex and encompasses a multitude of theories and ideas. In AP Biology, the first unit covered was evolution. Chapters 29, 31, 39, 40, 41, 42, and 43 in the textbook, Campbell’s Biology in Focus, not only discusses the four main ideas of biology: evolution, energy, information, and systems, but it also gives examples of each in order to help guide the reader’s understanding of the concepts. The first big idea of AP Biology is: “the process of evolution drives the diversity and unity of life.” Chapter 39 in the textbook encompasses this main idea through discussing natural selection and genetic diversity.

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(R. Bijlsma, 2005). This process is known as genotypic adaptation or evolutionary adaptation. These phenomena are important from an evolutionary perspective. The possible occurrence of evolutionary adaptation and the rate at which it can proceed depends on the presence

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Third, it is stated in the disclaimer that evolution consists of random and undirected forces. While mutation can throw a bit of a wrench into the plans, established mechanisms of change, such as genes, coupled with selective pressures, have direct control on the direction of evolution for fitness within a species. These three fumbles leads one to wonder how strong the author’s grasp on this science stuff could

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The physical differentiation in these four species highlight evolution, and in

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vNatural selection is the most popular theory by evolutionist, Charles Darwin. This theory is the belief that evolutionary change comes from organisms adapting to better fit with their environment, generation to generation. The variations that occur, give the organism a better chance of survival, ensuring that they can reproduce and pass on the trait to further generations. Eventually the variation will spread throughout the species. Natural selection can however be limited by several factors These factors include, the variation gene not being available, history not allowing the variation to develop or the trade-off of a variation creating a different problem for the animal.

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Introduction The theory of evolution has been discussed, evaluated, and researched many times since the theory was first brought to light. Darwin’s theory of evolution is said to be divided into two parts, common decent and natural selection (Bouzat, 2014). Many research papers agreeing with Darwin’s theory comment on the diversity of a species and how they have descended from one common ancestor. Natural selection is a process in which species that are better adapted to the environment tend to survive and reproduce (Dictonary.com).

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Many people believe that if you cannot see something, that something does not exist. By something I mean God. Those who discard the thought of a Creator then turn to science to provide evidence for our origins. The theory science puts forth is called evolution. What is evolution?

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